Signed pieces · Diamantaires OG
How to Recognize an Authentic Chaumet Jewel: Signature, Serial Number, Hallmarks
A Parisian jeweler founded in 1780, Chaumet creates pieces often handed down through generations. Here is what we look for, and what you can observe yourself. No single detail is conclusive on its own: only an in-person examination allows for a definitive assessment.
Where to look
On the inside of a ring’s band, near the clasp of a bracelet or necklace, or on the reverse of a pendant or brooch. You should typically find: the Chaumet signature (frequently Chaumet Paris), a serial number, the metal fineness mark (750 for 18k gold, 950 for platinum), and the legal hallmarks.
French hallmarks
In France, the eagle's head certifies 18k gold and the dog's head platinum; the diamond-shaped master hallmark identifies the maker's workshop. Antique pieces from the Maison bear the specific marks of their era: age is not a sign of suspicion, it simply tells its own story.
The finish, the primary clue
On a Liens jewel, the cross motif must be crisp and symmetrical; on a Joséphine, the tiara shape balanced and the prongs delicate; on a Bee My Love, the honeycomb facets perfectly defined. Counterfeits often reveal themselves through soft outlines and imprecise stone setting.
Warning signs to watch for
- uneven or overly deep engraving, with poorly formed or misaligned lettering;
- missing, blurry hallmarks or markings inconsistent with the stated metal fineness;
- crude finishing: visible solder marks, sharp edges, rough stone setting;
- an abnormally light weight for the stated gold purity, or metal that discolors;
- an asking price completely disconnected from market reality.
At-home tests: to be avoided
Acid, magnet, or scratch tests prove nothing and risk irreversibly damaging the piece.
Documentation
The original box, invoice, and certificate are useful, but they may have been separated from the jewel over time: they can never substitute for a physical examination of the piece.
Our appraisal process
At 43 rue Beaubourg, a state-certified gemologist examines your piece in your presence: reading engravings and hallmarks under a loupe, verifying metal fineness, checking weight and craftsmanship, and assessing gemstones. The valuation is free and carries no obligation. If you wish to sell, the Maison will make you a firm purchase offer; if you have already received an offer from a colleague, the Maison commits to offering you better.
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Free & confidential appraisal
Have your piece appraised
Describe the piece in 3 steps: a state-certified gemologist will reply within 24 h and tell you if it matches what we are looking for. The price is then determined during the in-person appraisal, with the piece in hand — free of charge and without obligation.
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They placed their trust in us
« Warm welcome, top-notch expertise. My Van Cleef necklace was purchased for a much higher price than other offers received. »
« A huge thank you for the sale of my Boucheron solitaire. Fully transparent appraisal and immediate payment. »
« Extremely satisfied. My 2-carat GIA diamond was purchased in just a few minutes, instant payment. 10/10! »
With or without an appointment
Make an appointment by telephone
Call us Monday to Friday, from 10 a.m. to 1 p.m. and 2 p.m. to 6:30 p.m.: we will set a time that suits you, without waiting. You may also come without an appointment during opening hours.
43 rue Beaubourg, 75003 Paris · Rambuteau metro station · Mon – Fri · 10am-1pm · 2pm-6:30pm
Frequently Asked Questions
Authenticating a jewel: your questions
Can you authenticate my Chaumet jewel from photographs?+
Photographs allow us to tell you if the piece matches what we are looking for, but cannot establish authenticity: this can only be judged in person, under a loupe. Send us photos of the inner engravings and reverse side, or visit our office.
Can I have my jewel authenticated without selling it?+
Yes. Our appraisal is free and carries no obligation: you leave with your piece and, if you wish, an offer that you remain entirely free to decline.
My Chaumet jewel has neither box nor invoice: can it still be authentic?+
Yes. Many heirloom pieces have lost their original paperwork. Authenticity is determined by the piece itself, not the presentation box.
Do I need to make an appointment?+
No. We welcome you with or without an appointment, Monday through Friday, from 10:00 am to 1:00 pm and from 2:00 pm to 6:30 pm. For a guaranteed time slot without waiting, please call us at 01 48 87 81 44.
Can you give me an initial answer before I travel to your office?+
Yes: send us a photograph and the model name on WhatsApp, and we will let you know if the piece corresponds to what we seek. We never provide price quotes based on photos alone: authenticity, condition, and gemstones can only be assessed with the jewel in hand.
The Appraisal Office
43 rue Beaubourg, Paris 3rd
Just steps from the Centre Pompidou, our appraisal office welcomes you Monday through Friday, with or without an appointment. You are received in complete confidentiality by a state-certified gemologist, who examines your jewel in your presence.
